<template>
  <div class="vaw-tab-bar-container">
    <div v-if="showHumburger" class="humburger-wrapper">
      <Humburger />
    </div>
    <div :class="{ 'tab-humburger-wrapper': showHumburger }" class="flex items-center">
      <n-icon
          class="arrow-wrapper"
          :class="{ 'arrow-wrapper__disabled': leftArrowDisabled }"
          @click="leftArrowClick"
      >
        <ChevronBack />
      </n-icon>
      <n-scrollbar ref="scrollbar" :x-scrollable="true" :size="0">
        <n-button
            v-for="item of state.visitedView"
            :key="item.fullPath"
            :type="currentTab === item.fullPath ? 'primary' : 'default'"
            class="mx-1 rounded-sm tab-item"
            style="--n-height: 24px; --n-font-weight: 200"
            :data="item.fullPath"
            @click.self="itemClick(item.fullPath, $event)"
            @contextmenu="onContextMenu(item.fullPath, $event)"
        >
          <span
              style="font-size: 12px; margin-top: 2px"
              class="text-item"
              @click.self="itemChildClick(item.fullPath, $event)"
          >
            {{ item.meta ? item.meta.title : item.name }}
          </span>
          <n-icon v-if="!item.meta?.affix" class="icon-item" @click="iconClick(item.fullPath)">
            <Close />
          </n-icon>
        </n-button>
      </n-scrollbar>
      <n-icon
          class="arrow-wrapper"
          :class="{ 'arrow-wrapper__disabled': rightArrowDisabled }"
          style="transform: rotate(180deg)"
          @click="rightArrowClick"
      >
        <ChevronBack />
      </n-icon>
      <n-dropdown :options="contextMenuOptions" placement="left-start" @select="onDropDownSelect">
        <n-icon class="arrow-wrapper" @click="rightArrowClick">
          <Menu />
        </n-icon>
      </n-dropdown>
    </div>
    <ul v-show="showContextMenu" class="contex-menu-wrapper" :style="contextMenuStyle">
      <li>
        <n-button :underline="false" type="text" @click="refreshRoute">
          <template #icon>
            <n-icon>
              <Refresh />
            </n-icon>
          </template>
          刷新页面
        </n-button>
      </li>
      <li :disabled="showLeftMenu">
        <n-button :disabled="showLeftMenu" type="text" @click="closeLeft">
          <template #icon>
            <n-icon>
              <ArrowBack />
            </n-icon> </template
          >关闭左侧
        </n-button>
      </li>
      <li :disabled="showRightMenu">
        <n-button :disabled="showRightMenu" type="text" @click="closeRight">
          <template #icon>
            <n-icon>
              <ArrowForward />
            </n-icon>
          </template>
          关闭右侧
        </n-button>
      </li>
      <li>
        <n-button icon="el-icon-close" type="text" @click="closeAll">
          <template #icon>
            <n-icon>
              <Close />
            </n-icon>
          </template>
          关闭所有
        </n-button>
      </li>
    </ul>
  </div>
</template>

<script lang="ts">
import store from '../../store'
import path from 'path-browserify'
import { defineComponent, h } from 'vue'
import { RouteRecordRawWithHidden } from '../../types/store'
import { NIcon, NScrollbar } from 'naive-ui'
import { Close, ChevronBack, Refresh, ArrowBack, ArrowForward, Menu } from '@vicons/ionicons5'
export default defineComponent({
  name: 'TabBar',
  components: { Close, ChevronBack, Refresh, ArrowBack, ArrowForward, Menu },
  props: {
    showHumburger: {
      type: Boolean,
      default: false,
    },
  },
  data() {
    return {
      currentTab: this.$route.fullPath,
      contextMenuStyle: {
        left: '0',
        top: '0',
      },
      showContextMenu: false,
      selectRoute: {},
      showLeftMenu: true,
      showRightMenu: true,
      state: store.state,
      rightArrowDisabled: false,
      leftArrowDisabled: false,
      contextMenuOptions: [
        {
          label: '刷新页面',
          key: 'refresh',
          icon() {
            return h(NIcon, null, {
              default: () => h(Refresh),
            })
          },
        },
        {
          label: '关闭所有',
          key: 'close',
          icon() {
            return h(NIcon, null, {
              default: () => h(Close),
            })
          },
        },
      ],
    }
  },
  watch: {
    $route(newVal) {
      if (['404', '500', '403', 'not-found', 'Login'].includes(newVal.name)) {
        this.currentTab = ''
        return
      }
      if (newVal.meta.noShowTabbar) {
        this.currentTab = ''
        return
      }
      if (newVal.query?.noShowTabbar) {
        this.currentTab = ''
        return
      }
      if (newVal.name) {
        store.addVisitedView(newVal).then(({ route, isNewRoute }) => {
          this.currentTab = route.fullPath || ''
          const scrollbar = this.$refs.scrollbar as InstanceType<typeof NScrollbar>
          if (isNewRoute) {
            scrollbar.scrollTo(
                {
                  left: 1000000000,
                  debounce: true,
                  behavior: 'smooth',
                } as any,
                0
            )
          } else {
            const el = document.querySelector(`[data="${this.currentTab}"]`) as HTMLElement
            scrollbar.scrollTo(
                {
                  left: el.offsetLeft,
                  debounce: true,
                  behavior: 'smooth',
                } as any,
                0
            )
          }
        })
      }
    },
    showContextMenu(val) {
      if (val) {
        document.body.addEventListener('click', this.closeMenu)
      } else {
        document.body.removeEventListener('click', this.closeMenu)
      }
    },
  },
  mounted() {
    this.initRoute()
  },
  methods: {
    initRoute() {
      const affixedRoutes = this.findAffixedRoutes(
          this.state.permissionRoutes as Array<RouteRecordRawWithHidden>,
          '/'
      )
      affixedRoutes.forEach((it) => {
        store.addVisitedView(it)
      })
      if (['404', '500', '403', 'not-found', 'Login'].includes(this.$route.name as string)) {
        this.currentTab = ''
        return
      }
      if (this.$route.meta.noShowTabbar) {
        this.currentTab = ''
        return
      }
      store
          .addVisitedView({
            path: this.$route.path,
            fullPath: this.$route.fullPath,
            meta: this.$route.meta,
          } as RouteRecordRawWithHidden)
          .then(({ route }) => {
            this.currentTab = route.fullPath as string
            this.$nextTick(() => {
              const elements = document.querySelector(`[data="${this.currentTab}"]`) as HTMLElement
              const scrollbar = this.$refs.scrollbar as InstanceType<typeof NScrollbar>
              elements &&
              scrollbar.scrollTo(
                  {
                    left: elements.offsetLeft,
                    debounce: true,
                    behavior: 'smooth',
                  } as any,
                  0
              )
              this.isDisabledArrow()
            })
          })
    },
    itemClick(path: string | undefined) {
      this.handleTabClick(path || '/')
    },
    itemChildClick(path: string | undefined) {
      this.handleTabClick(path || '/')
    },
    handleTabClick(path: string) {
      this.$router.push(path)
    },
    iconClick(fullPath: string | undefined) {
      this.removeTab(fullPath || '/')
    },
    findAffixedRoutes(routes: Array<RouteRecordRawWithHidden>, basePath: string) {
      const temp = [] as Array<RouteRecordRawWithHidden>
      routes.forEach((it) => {
        if (!it.hidden && it.meta && it.meta.affix) {
          temp.push({
            name: it.name,
            fullPath: it.fullPath,
            path: it.path,
            meta: it.meta,
          } as RouteRecordRawWithHidden)
        }
        if (it.children && it.children.length > 0) {
          temp.push(...this.findAffixedRoutes(it.children, path.resolve(basePath, it.path)))
        }
      })
      return temp
    },
    isAffix(route: RouteRecordRawWithHidden) {
      return route.meta && route.meta.affix
    },
    onContextMenu(fullPath: string | undefined, e: MouseEvent) {
      const tempView = this.state.visitedView.find((it) => it.fullPath === fullPath)
      if (!tempView) return
      const { clientX } = e
      const { x } = this.$el.getBoundingClientRect()
      e.preventDefault()
      this.selectRoute = tempView
      if (this.selectRoute) {
        this.showLeftMenu = this.isLeftLast(fullPath || '/')
        this.showRightMenu = this.isRightLast(fullPath || '/')
        const screenWidth = document.body.clientWidth
        this.contextMenuStyle.left =
            (clientX + 130 > screenWidth ? clientX - 130 - x - 15 : clientX - x + 15) + 'px'
        this.contextMenuStyle.top = '25px'
        this.showContextMenu = true
      }
    },
    removeTab(fullPath: string) {
      const findItem = this.state.visitedView.find((it) => it.fullPath === fullPath)
      if (findItem) {
        store.removeVisitedView(findItem as RouteRecordRawWithHidden).then(() => {
          if (this.currentTab === fullPath) {
            this.currentTab =
                this.state.visitedView[this.state.visitedView.length - 1].fullPath || ''
            this.$router.push(this.currentTab)
          }
        })
      }
    },
    // context menu actions
    isLeftLast(tempRoute: string) {
      return this.state.visitedView.findIndex((it) => it.fullPath === tempRoute) === 0
    },
    isRightLast(tempRoute: string) {
      return (
          this.state.visitedView.findIndex((it) => it.fullPath === tempRoute) ===
          this.state.visitedView.length - 1
      )
    },
    onDropDownSelect(key: string) {
      switch (key) {
        case 'refresh':
          this.refreshRoute()
          break
        case 'close':
          this.closeAll()
          break
      }
    },
    refreshRoute() {
      this.$router.replace({ path: '/redirect' + this.$route.path })
    },
    closeLeft() {
      if (!this.selectRoute) return
      store.closeLeftVisitedView(this.selectRoute as RouteRecordRawWithHidden).then(() => {
        if (this.$route.fullPath !== (this.selectRoute as RouteRecordRawWithHidden).fullPath) {
          this.$router.push(
              this.state.visitedView[this.state.visitedView.length - 1].fullPath as string
          )
        }
      })
    },
    closeRight() {
      if (!this.selectRoute) return
      store.closeRightVisitedView(this.selectRoute as RouteRecordRawWithHidden).then(() => {
        if (this.$route.fullPath !== (this.selectRoute as RouteRecordRawWithHidden).fullPath) {
          this.$router.push(
              this.state.visitedView[this.state.visitedView.length - 1].fullPath as string
          )
        }
      })
    },
    closeAll() {
      store.closeAllVisitedView().then(() => {
        this.$router.push(
            this.state.visitedView[this.state.visitedView.length - 1].fullPath as string
        )
      })
    },
    closeMenu() {
      this.showContextMenu = false
    },
    leftArrowClick() {
      const scrollbar = this.$refs.scrollbar as InstanceType<typeof NScrollbar>
      const scrollX = scrollbar.$el?.scrollLeft || 0
      scrollbar.scrollTo(
          {
            left: Math.max(0, scrollX - 200),
            debounce: true,
            behavior: 'smooth',
          } as any,
          0
      )
      this.isDisabledArrow()
    },
    rightArrowClick() {
      const scrollbar = this.$refs.scrollbar as InstanceType<typeof NScrollbar>
      const scrollX = scrollbar.$el?.scrollLeft || 0
      scrollbar.scrollTo(
          {
            left: scrollX + 200,
            debounce: false,
            behavior: 'smooth',
          } as any,
          0
      )
      this.isDisabledArrow()
    },
    isDisabledArrow() {
      setTimeout(() => {
        const scrollbar = this.$refs.scrollbar as InstanceType<typeof NScrollbar>
        const { scrollLeft, scrollWidth, clientWidth } = scrollbar.$el as HTMLElement
        this.leftArrowDisabled = scrollLeft === 0
        this.rightArrowDisabled = scrollLeft === scrollWidth - clientWidth
      }, 100)
    },
  },
})
</script>

<style lang="scss" scoped>
@import '../../assets/styles/variables.scss';
.vaw-tab-bar-container {
  position: relative;
  height: $tabHeight;
  line-height: calc(#{$tabHeight} - 3px);
  box-sizing: border-box;
  white-space: nowrap;
  box-shadow: 10px 5px 10px rgb(0 0 0 / 10%);
  .contex-menu-wrapper {
    position: absolute;
    width: 130px;
    z-index: 999;
    list-style: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.12), 0 0 6px rgba(0, 0, 0, 0.04);
    background-color: var(--base-color);
    padding-left: 0;
    & > li {
      width: 100%;
      box-sizing: border-box;
      display: flex;
      align-items: center;
      padding: 5px 0;
    }
    & > li:hover {
      color: var(--primary-color);
    }
  }
  .humburger-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
  }
  .tab-humburger-wrapper {
    margin-left: 40px;
    transition: margin-left $transitionTime;
  }
  .tab-no-humburger-wrapper {
    margin-left: 0;
    transition: margin-left $transitionTime;
  }

  .tab-item {
    padding: 7px 10px;
    cursor: pointer;
    .icon-item {
      margin-left: 0;
      width: 0;
      height: 0;
      transition: all 0.2s ease-in-out;
      overflow: hidden;
    }
    &:hover {
      .icon-item {
        display: inline;
        width: 14px;
        height: 14px;
        margin-left: 5px;
        font-size: 12px;
        background-color: rgba(0, 0, 0, 0.12);
        border-radius: 50%;
        padding: 1px;
        transition: all 0.2s ease-in-out;
      }
    }
  }
  .arrow-wrapper {
    cursor: pointer;
    font-size: 20px;
    margin: 0 8px;
  }
  .arrow-wrapper__disabled {
    cursor: not-allowed;
    color: #b9b9b9;
  }
}
</style>
